The CSA is an organization that writes standards and tests lighting equipment for performance as well as electrical and fire safety. Canadian provincial laws generally require that all products sold for consumer use in Canada must have CSA or equivalent approval.
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Glare is the visual discomfort caused by excessive brightness. This is called discomfort glare. If task performance is affected it is called disability glare. Glare can be direct glare or indirect (reflected) glare.
Natural light is no longer an after thought in home and commercial design. Light Harvesting is architectual design for building interiors which make use of daylight as a way of reducing energy consumption.